Method of applying wax carbon to paper



Dec. 17, 1940. D. L. BOYD 2,225,295

METHOD OF APPLYING WAX CARBON T0 PAPER' Filed Oct. 26, 1939 3 Sheets-Sheet l VENTOR' Don/11.0 5on9 Arrow/7 Dec. 17, 1940. D. BOYD 2,225,295

METHOD OF APPLYING WAX CARBON TO PAPER Filed Oct. 26, 1939 3 Sheets-Sheet 2 m/vavra'xe Dow/94a L. 5on2 Arm/awry Dec. 17, 1940. D, BOYDv I 2,225,295

METHOD OF APPLYING WAX CARBON T0 PAPER.

Filed Oct; 25, 193.9 -3Sheets-Sheet s Ill/1111111111111rlllllrllllllllllIll/1,1111

Mlvwfae DONQLD L. Bow:

ATTORNE enema n... 11. 1940 UNITED STATES PATENT I oFrIc-E METHOD OF APPLYING wax cannon 'ro rarnn I i 1 Donald L. Boyd, Huntington, w. vn., assignor .0

" Carb-O-Spot Corporation, Athens, Ohio Application October 26, 1939, Serial No. senses 4 Claims. (01. sir-7o) My invention relates to that class of presses designed to print spots ofv wax carbon on sheets of paper suchas is described in Rutkoskie Patent No. Reissue 19,642.

As set forth in that patent and the othersree the other parts of the. press with a hot fluid.

In the first instance, there are many electrical connections, collector rings, etc. whichmust be maintained and serviced continually.

In the second instance referred to, it has been. found impractical to form a tight joint where the heated fluid is transferred from a stationary conduit or pipe, which conducts it from the source of supply to the rotating parts of the PIESB. I. I. as My invention has for its principalobject to v Provide a method of heating the press which is entirely different from either of the methods followed in the manufacturing of wax spot carbon forms by the presses heretofore referred to in that it applies no heat of any kind to the rollers of the'press except by radiation from an external source.

The various steps comprising my method may be more readily understood by having reference to the accompanying drawings which are hereunto annexed andare a part of this specification. These drawings are furnished solely to illustrate a press which will employ the various steps comprising my methods but it will be obvious to those skilled in the art that the method isnot confined to any specific press, as numerous changes in the details of mechanical construction may be resorted to and still utilize the method. I have shown in these drawings a press of the type described in my copending application, Serial No. 243,089, filed November 30, 1938. In the drawings:

Fig. 1 is a side elevation of my improvement on a press of the type described in my copending;v

application, Serial No. 243,089;

Fig. 2 is the opposite side with the side frame omitted and some of the parts shown in section for the purpose of clearness:

as Fig. 3 is a plan view of the ink fountain showing the heating means, and means for controlling the heatingmedium;

Fig. 4 is a sectional view of a portion of the ink ountain, ink fountain roller, form roller, and

a fragment of the printing cylinder; and

Fig. 5 is an enlarged fragmentary detail view of a modified form of hood which is heated by fluid instead of by electricity. I y l Similar reference numerals refer to similar parts throughout the entire specification. l0

As shownin the drawings, the press comprises an impression cylinder I, a printing plate cylinder '2. These cylinders are carried by suitable shafts 3 and 4 journalled in the side frames 5 and 6 of the press. The plate cylinder is con- 15 tacted by a form roller I whichin turn contacts 7 the inkv fountain roller 8, which is partially immersed in the ink fountain 9. Y The ink fountain is perferably jacketed for the reception of a heating fluid. In Fig. 3 I have 20- shown an electrical heating element mounted in the Jacket, for the purpose of heating the fluid. I also show a thermostat which may be used to control the heatof the heatingmedium. Obviously, any form of heatingfor' the ink fountain, .25 which will-serve to melt the wax carbon, may be employed. Neither of the rollers I nor 8'is heated internally.

Radiant heat is supplied to the plate cylinder 2 by means of strip heaters i0 mounted on the 30 inside of a hood. This hood may be formed in two parts It and I2 and the strip heaters l0 are preferably disposed at suitable intervals around the hood on the inside thereof.

The hood, when in position, as shown in full 35 lines in Fig. 1, encloses the plate cylinder 2 as completely as is possible, and yet permit of its 7 operation.

The section l2 of the hood is carried by a support I to which it is pivotally secured. This sup- 40 port it is attached to the frame inany suitable or convenient manner. This construction permits section l2 of the hood to be swung on its pivots when it is desired to gain access to the printing cylinder 2.

Suitable electrical connections I5 and I8 connect the strip heaters iii to a sourceof electrical current supply (not shown). A standard thermostat lBa is mounted in the line to control and in a support 28 which is formed on the side frame.

A set screw It provides means to hold the I] in an elevated position whenitisdesiredto 1 l getmat the impression eylinder. l. Normally; it '1- This hood" l'llmayl also be providedwith a pine f rality of electricalstrip heatersitiand thus serve, the double purpose or retainins thelh'eat'lyhich is furnished by the heaters on the hood which encloses the printing cylinders and also by radiant-1 heat sent out by the diflerentparts oi thepress l below it, n n

Insome cases it m beiound desirable to use' other ;forzns oi heatin: mediumwi'orwthe hoodstq; Oneiorm is shown in Fig. 5 inwmch1tthe1 hood is formed with a double wall1lHand;QIQ. The space intermediate the two walls mledvwith steam or equivalent: fluid heating means such s's hotwater or hotoii circulating throuzhcoils, It i will thus rbe se n that :1 hate-[been] able; in this manner to entirely avoid the necessity; of g a' i connection betyeen :a rotating. andinonqrotating part thereof which Imustibe used for kthe hea tinl 1 I fluid. In Practice this has been accompanied by highly satisfactory results. gInste'ad 1,0! the l to the printing cylinder bi radiation. The mum H elements which supply the samemay conveniently? be mounted in the enclosing means, By thisw method I havebeen ableto'produceyerysatisfac;

adjacent the press being always surrounded with? a mass oi liquid caused by the condensation or the steam'or leakage a: the hotoil or'hot Water,

it can be kept periec'tljr dry and cleanylthus eh i 5 abling the production or a mgner sraaeor york.

The steps of fthe method followed-in the operation oi! the press are as follows) The wait carbon: is placed in the heated ink fountain and melted until it'is the properconsistency, it is then trans -i ferredhy'mearis of an unheated lroller'to aprintin; cylinder which pr'eierablybut not necessarily i {is almost entirely enclosedgheat'is then applied torycomm'ercial jobs. 1

ltfwill also be apparent to persons skilled in l the art that many changes can bemade inthe construction adopted to utilizemy method, For" example, it may in some cases be found possible to utilize; a fsun ray iampmr strip hesters mishtl be mountedon a skeletonirame instead 0! a yFor these-irea sonspthereiore, Ido; notwish we understood aslimitins myseii to theprecise form:

new and dedre to securefbyklaetters Patent is:

comprisinsli mejmumuaepeMuseums carhon? to transferring a thehot yaxcarbonito a printing; mechanisznaw plyinssiradiant heat strong: snxesternai source to 1 the said printing the heatiwhich crisinally nielts i'waxfesrbon and said radiant heat constituting sole"; used inlthe process. 1

n 2. The methodot awlilnswaxcarbon tonper comprising; the iolloyins" steps heatlnsgthe cae- Lbo mem n the hot wax ear-bon to Iprihjtins cylinder, apply-n" fexternajlsource to said in: radiantheat ma,

"Iiresard 1.1;The memodet'applyi s to paper w im w e mn tfwm h wim v mm nthe gug arabq ne gsaid radiant heat constituta in! e 9 9 1 wimm bw f 3. The methodoiqapplyin'syaxcarbon topaper 1 cornprisi'ns the "followins,i-steps:j team; the car:

bon to apredetermined mperatureftransieritihsw the hot wax carbon tofa nismLM I 4; Themethodoi' applyins wax carhontopaper 1 comprising the) iollowin: stepst 'ljheatini the ear-n 1 bon to a predetermined temperstu'redtransterrms a Y rintins n echanis maw plying radiant; heatfli'l'ofilil an external, source to i the said printinsgmechanism, the heatwhich brie-1 inally melts the wax carbon andsaid rsdiantheat constitutins'the soie heat used in, process and i at leastpartiaiiy enclosing thezprintins mecha 1 the not wsxjcsi-bonto a printing eylinde rgfapply-l s in: radiant heat from an external source: to the 1 said riming; cylinder; the heat which Tammany melts the its: carbon and :said' radia'nt heat constitutins'the sole heat used inthe process and at least partially enclosinsgthe printing cylinder.

DONALD L. 

